Four Seasons 85931 Engine Coolant Thermostat Housing

Thermostat Housing for Volkswagen Cooling Systems

Four Seasons Thermostat Housing 85931 is an engine coolant thermostat housing built for Volkswagen cooling system service. It is a black plastic housing with the gasket or seal included, and it meets or exceeds OEM requirements for direct replacement use.

Key Features

• Brand: Four Seasons Thermostat Housing
• Part number: 85931
• Plastic housing with black finish
• Gasket or seal included
• Thermostat not included
• Style: w/o thermostat
• Meets or exceeds OEM specifications
• Engine coolant components application
• Outlet port diameter: 32.12
• Inlet port diameter: 1.500
• Bolt hole center to bolt hole center: 3.03
• Flange thickness: 0.400
• Overall height: 1.770 in

Product Details

This thermostat housing is intended for Volkswagen cooling system repairs where the original housing is cracked, warped, or leaking. Four Seasons 85931 is a direct-fit style replacement for select Volkswagen EuroVan, Jetta, Golf, Passat, and Corrado applications, with fitment covering 1992-2000 model years depending on vehicle. This part cross-references Genuine 021121117A for the same application.

Vehicle Fitment

• Fits 1999-2000 Volkswagen EuroVan, N/A
• Fits 1997 Volkswagen EuroVan, N/A
• Fits 1994-1999 Volkswagen Jetta, N/A
• Fits 1995-1998 Volkswagen Golf, N/A
• Fits 1993-1997 Volkswagen Passat, N/A
• Fits 1992-1995 Volkswagen Corrado, N/A

Common Repair Uses

• Coolant leaks at the thermostat housing
• Cracked or brittle plastic housing replacement
• Damaged sealing surface at the coolant outlet
• Overheating caused by housing seepage or seal failure
• Service replacement during thermostat system repair

Installation Notes

Verify the inlet and outlet port dimensions, bolt spacing, and housing style before installation. Transfer or install the thermostat separately, since this housing is supplied without a thermostat. Clean the mating surfaces thoroughly and replace any worn coolant hoses or clamps during service to help maintain a proper seal.

Quality Assurance

Four Seasons 85931 is built to meet or exceed OEM specifications for the listed Volkswagen applications. The included gasket or seal supports a proper sealing surface during thermostat housing replacement.